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Method for adsorbing and removing aluminum from rare earth material liquor through complexing-ion exchange synergistic effect

An ion exchange and synergistic technology, applied in the fields of chemistry, hydrometallurgy, and materials, it can solve the problems of difficulty in separating rare earth and aluminum, and achieve the effect of reducing concentration and production cost.

Active Publication Date: 2018-11-23
JIANGXI UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problem of difficult separation of rare earth and aluminum in rare earth feed liquid, the present invention provides a method for adsorption and removal of aluminum from rare earth feed liquid through complexation-ion exchange synergy. The method has low requirements on equipment, simple operation and low cost. No pollution, can effectively remove aluminum ions from rare earth feed liquid

Method used

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  • Method for adsorbing and removing aluminum from rare earth material liquor through complexing-ion exchange synergistic effect
  • Method for adsorbing and removing aluminum from rare earth material liquor through complexing-ion exchange synergistic effect

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Rare earth concentrate hydrochloric acid leaching solution: aluminum content 0.944g / L (as Al 2 o 3 ), the rare earth content is 84 g / L (based on REO), and the pH of the solution is 1.5.

[0042] (2) Pipette 100mL of leaching solution into a 300mL Erlenmeyer flask and put it into a constant temperature water bath with magnetic stirring, weigh 0.7058 g of 5-sulfosalicylic acid into the Erlenmeyer flask, stir at 20°C and add 10% NaOH The solution slowly adjusts the pH of the rare earth solution to 4.5 and reacts for 5 minutes.

[0043] (3) 20g D290 type anion exchange resin was wet-packed, and then the leaching solution was passed through the D290 type anion exchange resin column at 1 mL / min, and the Al in the solution after adsorption was 3+ 0.11g / L, the removal rate of aluminum is 78.1%, and the loss of rare earth is 4.7%.

Embodiment 2

[0045] (1) Rare earth concentrate hydrochloric acid leaching solution: aluminum content 0.944g / L (as Al 2 o 3 ), the rare earth content is 84 g / L (based on REO), and the pH of the solution is 1.5.

[0046] (2) Pipette 100mL of leaching solution into a 300mL Erlenmeyer flask and put it into a constant temperature water bath with magnetic stirring, weigh 0.8068 g of 3-sulfosalicylic acid into the Erlenmeyer flask, stir at 30°C and add ammonia water to slowly adjust Rare earth solution pH = 4 reaction 10min.

[0047] (3) 20g D290 type anion exchange resin was wet-packed, and then the leachate was passed through the D290 type anion exchange resin column at 5 mL / min, and the Al in the solution after adsorption was 3+ 0.145g / L, the removal rate of aluminum is 77.3%, and the loss of rare earth is 3.0%.

Embodiment 3

[0049] (1) Rare earth concentrate hydrochloric acid leaching solution: aluminum content 0.178g / L (as Al 2 o 3 ), the rare earth content is 100 g / L (based on REO), and the pH of the solution is 2.0.

[0050] (2) Pipette 100mL of leaching solution into a 300mL Erlenmeyer flask and put it into a constant temperature water bath with magnetic stirring. Weigh 0.1565 g of 4-sulfosalicylic acid and add it to the Erlenmeyer flask. Adjust the pH of the rare earth solution to 4.5 and react for 30 minutes.

[0051] (3) 20g D290 type anion exchange resin was wet-packed, and then the rare earth feed solution was passed through the D290 type anion exchange resin column at 10 mL / min, and the Al in the solution after adsorption 3+ 0.041g / L, the removal rate of aluminum is 82.9%, and the loss of rare earth is 4.3%.

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Abstract

The invention discloses a method for adsorbing and removing aluminum from rare earth material liquor through a complexing-ion exchange synergistic effect. Salicylic acid derivative is utilized as an organic ligand to treat a rare earth solution, then D290 type anion exchange resin is utilized to adsorb complexing anion generated by reaction between aluminum ions and the organic ligand, and aluminum ions can be removed from the material liquor. By means of controlling the organic ligand use amount, a reaction temperature, a solution pH value, the rare earth material liquor and a resin column flow velocity, a removal rate of aluminum ions in the rare earth material liquor can reach 70% or more, and rare earth loss does not exceed 5%. Compared with the prior art, the method for adsorbing andremoving aluminum from rare earth material liquor through the complexing-ion exchange synergistic effect has a low equipment requirement and simpleness in operation, and a lot of factory areas required by multilevel extraction of an extraction method are avoided; meanwhile, the problems that aluminum hydroxide flocculent precipitate is difficult to filter and has seriousness in entrainment; furthermore, the used D290 type anion exchange resin can be recycled, and production cost is reduced.

Description

technical field [0001] The invention relates to a method for adsorbing and removing aluminum from rare earth feed liquid through complexation-ion exchange synergy, and belongs to the technical fields of hydrometallurgy, chemistry, materials and the like. Background technique [0002] Today is the information age, with a wide variety of electronic products and a huge market, and these modern industrial products are inseparable from rare earths. With the development of technology, the status of rare earths in modern industry will become more and more important. Ion-adsorption rare earth ore is a relatively special type of rare earth ore, also known as weathering crust leaching type rare earth ore, which was first discovered in Jiangxi Province in 1969. Among them, the ion-adsorption type rare earth deposits in southern Jiangxi not only have a large number and large reserves, but also have the advantages of a complete range of rare earth elements, that is, a complete distributi...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/42C22B3/24
CPCC22B3/24C22B3/42C22B59/00Y02P10/20
Inventor 李金辉徐志峰陈志峰
Owner JIANGXI UNIV OF SCI & TECH
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